Normal Curve Prob

Probability theory and statistics

Normal Curve Prob

Postby Guest » Fri Feb 17, 2017 4:20 am

there are three basic types of new cars: four-door sedan, two-door coupe, and hatchback. Suppose the sampling distribution for the proportion of people who purchase a sedan is approximately normal with mean 0.25 and standard deviation 0.019.
(a) Carefully sketch this normal curve. Provide a scale on the horizontal axis.(probably the only problem I can do..)
(b)What is the probability the sample proportion is between 0.212 and 0.288?
(c)What is the probability the sample proportion is greater than 0.275?
(d)What is the probability the sample proportion is less than 0.220?





Guest
 

Return to Probabilities and Statistics



Who is online

Users browsing this forum: No registered users and 1 guest

cron